NAME – 18.5x70mmR (12 Gauge 2 ¾ inch) #8 Shot

TYPE – Shotgun shell

YEAR OF INTRODUCTION – 1862 [1877]

COUNTRY OF ORIGIN – Europe [USA]

CASE TYPE – Rimmed straight

CARTRIDGE LENGTH – 6.2 cm (2.440 in)

CASING LENGTH – 7 cm (2.76 in)

CASE HEAD DIAMETER – 18.9 mm (0.744 in)

CASE RIM DIAMETER – 20.8 mm (0.819 in)

LOAD – #8 Lead Shot

LOAD WEIGHT – 28.4 g (1.0 oz – 437.5 grains)

PELLET DIAMETER – 2.03 mm (0.08 in)

NUMBER OF PELLETS – 410

WEIGHT OF PELLET – 0.07 g (1.07 grains)

TOTAL ROUND WEIGHT – 40 g (1.41 oz)

MUZZLE VELOCITY – 355 m/s (1165 fps)

NOMINAL BARREL LENGTH – 76.2 cm (30 in)

MUZZLE ENERGY – 1788 j (1319 ft/lb)

MUZZLE ENERGY PER PELLET –4.36 j (3.22 ft/lb)

10 fps/in per 2 inchs bbl length from nominal

     The original center-fire shotgun shell was first invented in Paris, France, then improved on and patented by M. Schneider. Paper and brass shotgun shells were developed and first marketed by Winchester in 1877 and are nearly identical to those shells used today.